titus



(No Model.) 2 Sheets-Sheet l.

E. L. BOWERS 8v J. E. TITUS.

SGRBW'MAGHINE.

No. 469,325. Patented Feb. 23, 1892.

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(No Model.) 2 sheetssheet 2.

E.' L. BOWERS & J. E. TITUS. SCREW MACHINE.

Patented Feb. 23, 1892.`

LII/1 iam@ INEE .f ,Ewen/it? n y jg NITED STATES PATENT OFFICE.

.EDVARD L. BOWERS AND JONAH E. TITUS, OF ORANGE, MASSACHUSETTS,ASSIGNORS OF ONE-THIRD TO VILLIAM L. GROUT, OF SAME PLACE.

SCREW-MACHINE.

SPECIFICATION forming part of Letters Patent No. 469,325, dated February23, 1892.

Application iiled March 30, 1891. Serial No. 386,956. (No model.)

To @ZZ whom t may concern:

Be it known that we, EDWARD L. BowERs and JONAH TITUS, citizens of theUnited States, residing at Orange, county of Franklin, and State ofMassachusetts, have invented new and useful Improvements inScrew-Machines, of which the following description, taken in connectionwith the drawings herewith accompanying, is a specification.

Our invention relates to machines adapted for forming screws, ttc., andhas for its object to provide the requisite mechanism whereby the screwstock or wire from which screw-blanks and screws are to be formed I5 maybe supplied or fed to the machine and the blanks formed or turned,threaded, cut, and separated from the stock or wire and the headsslotted at one operation automatically. This object is attained byproviding the mazo chine with a mechanism for grasping the screw a-fterit has been turned and threaded and before it has been cut off orseparated from the screw stock or wire and slotting the head of the sameautomatically.

2 5 According to our invention we provide the usual turret ortool-carrier with a chuck which is adapted to be moved forward by amovement of the turret-carriage and open to receive within its grasp thestem of the screw 3o or blank after the latter has been formed and whileit is being cut from the screw stock or wire. After the screw has beensevered from the latter the chuck recedes and closes on the screw tohold the same firmly in its grasp.

3 5 Thereafter a rotating saw carried by the crossslide is moved forwardby a movement of the latter in line with the screw held in the saidchuck to slot the same as it is moved into engagement therewith by theaction of the turret-carriage. After the screw has been thus operatedupon the chuck is opened and the screw ejected therefrom.

Our invention consists more particularly in this specification of thepeculiar construction of the said chuck for grasping and handling thescrew and its operation, in combination with the other parts forming themachine, as will hereinafter be more fully described in detail, andpointed out in the claims.

5o Referring to the drawings, lFigure l represents the front elevationof a machine embodying our invention; Fig. 2, a sectional View throughline 2 2 of Fig. l, showing the cross-slide and the several partssupported tliereon; Fig. 3, a longitudinal sectional view through thecenter of the chuck carried by the turret; Fig. 4, a front end view ofthe same; Fig. 5, a side elevation of the crossslide detached from themachine with the.P several parts supported thereon; Fig. 6, a sec- 6otional view through line 6 6 of Fig. 5, showing the tool for cutting thescrew from the wire and the stops for engaging with the chuck carried bythe turret. Figs. 7, 8, and 9 represent the side, end, and plan views,respectively, of a device secured to the turretcarriage for engagingwith the chuck carried by the turret.

To explain in detail, A represents the framework of the machine; B, thedriving-shaft; C and D, cam-carrying pulleys located on saiddriving-shaft; E, the sliding carriage supported in ways e e on theframe A and operated by the cams located on the pulley O; F, the turretor tool-carrier mounted on said sliding carriage; G, the cross-slideoperated by levers g and g; H, a cam-carrying disk for operating saidlevers g g, and I the chuck, the latter being adapted to be opened andclosed in the usual manner by means of the sliding conical collar i andlevers z" t" through the medium of the head 2 and hollowsupporting-spindle i3.

The construction, arrangement, and operation of the above-mentionedparts being well understood by those skilled in the art and not of ourpresent invention, it is thought to be unnecessary to describe the samein detail herein.

The screw stock or wire represented at ais adapted to be insertedthrough the hollow spindle i3 and chuck I, with one end projecting, thelatter, as shown in Fig. l, to be held and rotated thereby in a mannerto be operated upon in the usual way by suitable tools 9 5 ff, carriedby the turret F to have the screw turned and the thread cut thereon, andwhen thus formed be cut from the screw stock or wire by means of acutting-tool g', supported by the crossslide G. In this instance andaccording to our invention we have also provided the turret F with achuck K, supported IOO thereby in the usual manner. This chuck Kconsists, as more clearly shown in Fig. 3, of an outer supporting-shell7c, open at one end and provided with inner tapering walls at said openend, the jaws 7c being secured at one end to a supporting-head 7cm andat their opposite free end are tapered to conform to the said taperingend of the shell 7c in such manner that the same are compressed orclosed when pushed forward and opened by reason of their elasticity whenreleased or allowed to move backward in the usual manner. These saidjaws are held in a normal closed position by means of a coiled spring7a2, located at the rear end of the shell 7c, which exerts a forwardpressure against their supporting-head. The forward end of this springis inclosed ina cap or shell 7c3, loosely supported in the outersupporting-shell 7a and provided with an arm 7a4, projecting therefromthrough a longitudinal .slot or openingk in the-outer shell 7@ in suchmanner that when the turret is carried forward -by a movement of itscarriage said arm 7c4'is adapted to engage with a stop or projection g2on the cross-slide G, as shown in Fig. l, and compress the spring 7a2 toallow the jaws of the chuck to open before reaching the screw formedupon the end of the wire a and pass over and receive the same within itsgrasp. W'hen the screw has been cut or severed from the lwire a, thecross-slide recedes to move the cutting-tool g from engagement with saidwire and at the same time moves the stop g2 from engagement with the arm7.54 to permit the spring 7a2 to close the jaws 7c upon the screwsupported thereon, as shown ,at avin Fig. 3, and hold the same to beoperated upon, as will be described.

We also provide an ej ector, so called, lo-y cated within the openingbetween the jaws 7c', consisting of a rod or plunger k6, elasticallysupported in a normally-extended position adjacent to the forward end ofthe chuck by means of a coiled spring 767, which has its bearing againstthe said supporting-head 7010. This ejector is also provided with an arm7a3, projecting therefrom through alongitudinal slot or opening 769between the jaws of the chuck and a corresponding slot or opening in theouter shell 7c, forward of the saidarm 7a4. The arm 7cB is shorter anddoes not project the shell k as far as the said rear arm 7a4, in orderthat itmay pass over the said stop or projection g2, when the chuck ismoved forward, without engaging therewith. It is, however, adapted toengage with a second stop or projection g3 on the cross-slide as thechuck is carried forward and the jaws have begun to open to receive thescrew, as before described,

in order to hold the ejector stationary or move the same-to the rear ofthe chuck to allow for the admission of the screw between the jaws ofthe same. As the chuck recedes with the screw in its grasp, the arm 7:;4is released from engagement with its engaging stop g2 to allow thespring k2 to bear against the head 7010 and cause the j aws to close onthe screw, as before ter this movement of the cross-slide the chuck K iscarried forward by a movement of the turret and carriage to move thescrew carried thereby into engagement with the rotating saw to have theslot or groove cut therein.- After the screw has been thus slotted, thechuck K recedes with the screw in its grasp, the cross-slide is movedback to carry the saw to its former position, and the Achuck I opens toallow the wire d to be fed forward the length of a screw, and thencloses to hold and rotate the same to have another screw formed by theproper tools carried by the turretF. As the screw is thus being formed(it being understood that the turret revolves in the usual manner tobring into position the proper forming-tools) the screw held in thechuck K is retained thereby until the turret has partially rotated andthe arm 7o4 is brought into contact with a stud or projection c', (shownin detail in Figs. 7, 8, and 9,) located on the sliding carriage E,which serves to compress the spring 7a2 and allow the jaws of the chuckto open and the ejector 7.36 to eject the screw therefrom. into asuitable receptacle adapted to receive the same.

The stops or projections g2 and g3, adapted for engaging with the arms7o4 and ks to operate't-he jaws of the chuck and the ejector k6, ashereinbefore described, are in the present instance, and as more clearlyshown in Fig. 6, seated in grooves in the cross-slide and adjustablyheld in position by means of screws g4 and g5. The object of the saidstopsbeing adjustable, as described, is to allow their position to bechanged or adjusted to engage with the arms 7.3L and ks sooner or later,as desired, and thereby control the action of the action of the chuckand ejector, as will be readily understood. Such adj ustability is alsodesirable to allow for the wear of engaging parts, the., although it isobvious that the same may be iixed and formed integral with the crosslslide or part thereof.

Having thus set forth our invention, what we claim as new, and desire tosecure by Letters Patent of the United States, is-

l. In a machine adapted for forming screws, dac., the combination, witha chuck and a crossslide supporting a sawing mechanism, of a- The screwswhen thus ejected fall- IOO' IIO

jections located on the machine to operate the devices to which they areattached, substantially as described, and for the purpose set forth.

2. In a machine adapted for forming screws, rbc., the combination, witha rotating chuck for turning the screw stock or wire, a turret providedwith tools for forming the blank or screw from said wire, and with achuck for graspingsaidblank orscrew when thus formed, of a reciprocatingcross-slide provided with a device for cutting said ,screw or 4blankfrom the wire, and with a sawing mechanism for slotting the screw heldin said chuck, substantially as described, and for the purpose setforth.

3. In a machine adapted for forming screws, dac., the combination, withthe chuck and a cross-slide provided with a sawing mechanism supportedthereon, of a chuck carried by the turret, provided with a spring forclosing the jaws of the same and a device for engaging said spring toallow said jaws to open, adapted to be operated substantially as and forthe purpose set forth.

4; The combination, in a machine with a rotating chuck and a sawingmechanism, of a chuck `carried by the turret, provided with an ejectoror spring-actuated plunger located therein, having an arm adapted t0engage with a stop or projection on the machine to operate said ejectorin a manner substantially as described, and for the purpose setforth.

5. In a machine adapted for forming screws, the., the combination, witha chuck and a cross-slide provided with a sawing mechanism supportedthereon, of a chuck carried by the turret, adapted to be automaticallyopened when moved in one direction and closed when moved in the oppositedirection, substantially as described, and for the purpose set forth.

`6. A chuck consisting of an outer supporting-shell, jaws located withinsaid shell, a spring for acting upon the rear end of said jaws to holdthe engaging ends ot the same in a normal closed posit-ion, and a cap orshell for engaging the forward end of said spring and provided with anarm projecting through the outer shell, whereby said spring may becompressed to release the pressure upon said jaws to allow the latter toopen, substantially as and for the purpose set forth.

7. A chuck provided with an ejector or spring-actuated plunger locatedtherein to the rear of thel engaging jaws and provided with a projectingarm as a means whereby it may be operated, substantially as described.

S. In a screw-machine, the combination, with a chuck and a cross-slideprovided with a sawing mechanism, of a chuck carried by the turret,provided with a device for operating the jaws of the same and with anejector or spring-actuated plunger, both of said devices being providedwith a projecting arm adapted to engage adjustable stops or projectionswith which the said cross-slide is pro. vided, substantially as and forthe purpose set forth.

EDWARD L. BOWERS. JONAH E. TITUS.

Witnesses:

WALTER L. RANNEY, GEORGE F. SMITH.

